.child {
    display: block;
    width: 220px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 18px;
    background-color: aquamarine;
    border-radius: 10px;
    background-image:
        linear-gradient(to right, aqua, pink);
    cursor: pointer;
    margin: 50px auto;
}

* {
    margin: 0;
    padding: 0;
}

.father {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
}

/* .child {
    margin: 50px auto;
    text-align: center;
    color: #222555;
    width: 120px;
    height: 50px;
    line-height: 50px;
    border: 3px solid #222f58;
    cursor: pointer;
} */

h1 {
    display: none;
    margin: 100px auto;
    text-align: center;

}

.big {
    display: none;
    width: 200px;
    height: 200px;
    margin: 100px auto;
    border: 5px solid palegoldenrod;
    line-height: 200px;
}

h2 {
    text-align: center;
}